This is not meant to be a step-by-step guide; this simply lists everything you can do to make your inventory neater.




Every item that is not a Pixpet egg will go in your inventory. There are different types of items: some have grades (potions/evobars, potion ingredients, seeds & pumpkin/plant products) and some don't (decorative items/capsules, fertilizers, basic and special ingredients, super potions, adventure items).

One stack of items takes up one space in your inventory; items with a grade will form separate stacks based on grade (ex. a g45 item will stack up with another g45 item of the same type), decorative items do not stack, and anything else will stack until x99, after which a new stack of the same item will be created.

Your inventory can go over its capacity if it's full (or becomes full) when you win an auction on the market, clear a room using the "clear house parts" mechanic, or receive items through the site commission system, so you do not risk losing anything into the void. But, you will not be able to receive any more items into your inventory from other sources, such as hoards, until you clear space.





Sellback
This is one of the most obvious inventory clearing methods. Selecting the "sellback" option in your inventory will make it possible for you to instantly sell items and delete them permanently in exchange for PC.

When it comes to what you should sell or what you should hold on to, you can hover on the (i) icon that every item has and it'll tell you what the item is used for. The wiki is also your friend, and it might also come down to just how desperate you are to get rid of something. Here is a brief run-down on what's good to keep in mind, based on how I organize:

Decorative items: this is a tricky one that you might want to ask other players about, since even some fairly common deco can be desirable, while some very rare deco is almost never sought after.

Seeds: I recommend keeping all pumpkin seeds. As for plant seeds, keep g100 seeds and sell back any that are lower. Though, most of the seeds are very common and can be easily acquired if need them, so if you really need space, don't worry about them too much. This guide also has a seed managing section so be sure to read it.

Cooking ingredients: for ingredients with grade, anything with a low grade you can sell back, usually with the exception of liquid pearl and liquid diamond. For special ingredients, the most valuable ones are Jade Beads, Moondrops, Finngriff Feathers, Black Mushrooms and White Dragon Scales. As for the rest of the special ingredients, selling them back for organizational purposes is fine, since if you do end up needing something, it will likely be readily available for sale.

Fertilizers: All of them can be useful, depending on what you need. Pumpkin max fruits and fruit increase fertilizers are keepers, the rest you can decide for yourself.

Potions, super potions, evobars: These are not usually the subject of sellback due to being useful and more difficult to obtain. If an evobar's or evolution potion's grade is too low for the pet, you can use them to make reverse evobars and unlock the recipes for them, which counts towards a badge, before selling them back.

Pumpkin products: There is no need to sell back pumpkin products. Use them for food pellets if you need to get rid of them quickly. You can convert all three products (flowers, sprouts, full grown pumpkins) into pellets.

Adventure items: Evolution items that you can bring in from adventure are a separate category but function similarly to special ingredients. They can all be obtained once per pet, but are easy to get with the exception of the Diamond Nugget. Keeping them in your pet's adventure inventory would be best until you actually need the item, but if you already moved it and don't think you'll use it, you won't lose much by selling it back.


Usershop? Thanks to the usershop search and the increase in slots from 5 to 15, it's a lot faster and better now to sell things through there. While there are items that will probably not sell very fast even if you list them at 1pc, others might get you a good 10pc or more. It's always a good idea to give it a try.



Combine seeds/average grade
Some of the best ways of freeing up some space without getting rid of anything are those two features. These apply to items with grades specifically.

For plant and pumpkin seeds, under the "cultivation" tab, you can find the seed combining section. Combining seeds of the same type will add up their grades and put them in the same stack. Grade won't go beyond 100, however, so if there is any leftover grade, it will remain as a single separate packet of seeds. Keep in mind that by doing this, you lose single units of seeds, so don't do this to seeds you intend to sell back if you want to make more PC.

For the rest, from under the "items" tab go to the "average grades" section. There, you can average different grades of the same item to compile them all into one stack. That is not quite the same as combining seeds; instead of adding up the grade until it reaches 100, the numbers are averaged instead, so don't average a low grade and a high grade item if you want it to keep its high grade (in fact, it's probably a good idea to read an averaging guide if you don't want to screw up). Unlike with seeds, the amount of single units you have will not decrease; if you average 3 items with 5, you will end up with 8 in a single stack.



Refining
Some items are not useful in their "raw" stage and must be refined in the Refining Station. A few plant products and special ingredients are like that; the selection is small but can still make a difference. Most notably, 99x White Dragon Scales will make 1x Dragon Scale Elixir, and 50x Moondrops will make 1x Blue Moon Elixir. You can also directly bake 30x Black Mushrooms into a Color Reroll Evobar, 50x Jade Beads into a Feline Second Evobar, and 20x Finngriff Feathers into a Corvidae Evobar.


Your house can be storage
If you are wondering what to do with that basement/attic in your house, where no pixpet is allowed to step foot, you can place any item you own on vacant tiles in there. Everything is placeable, deco or not! That removes the items from your inventory while letting you keep them. It's best to do that with items you only have 1-2 of, as you can't place down a stack of more than one item on just one tile. Pixinytes can also be placed in a house to help with your pixpal inventory.

If you want to move house, but your inventory does not have enough space to take everything back one by one, you can use the house part clearing mechanic will clear your rooms and overload your inventory so that you can simply place it all back into your new house afterwards without anything being lost.



Other ways of storing
Item storage boxes, which you can buy from the PPT balance page, are a good alternative; although they do cost PPT which are hard to get without real money, if the option is available to you it's a good idea to make use of it. Each item storage box can hold 16 items of any type, and you can buy as many as you want. If you want to store items in your boxes, you can do so in item storage under the "items" tab. Using boxes is a very good way to organize things like collections!

Cooking stations can also serve as temporary storage; if you are in desperate need of just a few extra slots, an empty kitchen has 12 spaces total for you to utilize. Each station features 4 ingredient slots to which you can add any item (including stacks!) besides deco, without having to match a recipe. You can keep them in there for as long as you'd like without them taking up inventory space, but you will not be able to cook or use the items until you take them back.

The usershop has 15 slots and the item market has 5 slots that you can add any item to, including stacks. Making the price tags ridiculously high will ensure no one will snag your belongings while you are sorting your inventory out.

Personal trading also allows up to 5 pending trades. If someone agrees to help you out, you can store any items, including stacks, in pending trades. Make sure the trades don't get declined while your inventory is full, or the items will be lost to the void (need confirmation on whether or not that is still a thing?)

Pixpets can hold up to three different, singular potions of the same color as the pet (or neutral, so that works for evolution potions as well), which you can take back whenever if you don't send them on hoard.




Buy more inventory space
In that unlikely situation where you've tried everything but still it seems like you just have too much stuff that you don't want to part with, the best solution might just be buying more slots. You can add 50 slots at a time to your inventory from your pixcoin balance page by spending pixcoins, so even just one purchase should get you more than enough space in most cases, and last you a while. The price will double with every purchase until it eventually caps at 40960pc.

I updated this guide a bit to reflect recent changes! With the inventory situation made a lot less frustrating, it probably won't be as necessary to read a guide on how to save space, but for those of us who like to keep things organized, it might still be useful :D